Button switch



FIG. 1 is a top perspective view of the button switch;

FIG. 2 is a bottom perspective view of the button switch;

FIG. 3 is a top view of the button switch;

FIG. 4 is a bottom view of the button switch;

FIG. 5 is a left side view of the button switch; and,

FIG. 6 is a front view of the button switch.

The right and back views are mirror images of the left and front views, respectively. 

The ornamental design for a button switch, as shown and described. 